Origami Open Sink Fold: It’s a folding technique in origami that is used to create a sunken or collapsed area in the paper. It’s considered an intermediate technique because it requires some manipulation of the creases.
How to make an open sink fold
Start off with a square base positioned like a diamond. Fold the top of the paper along with the dotted line. Fold this well and then unfold it.
How to make an open sink fold
Open the paper. Let’s make an open sink.
How to make an open sink fold
You will find a square in the center, use your fingers to press the four creases and transferring them into mountain folds.
How to make an open sink fold
Inside the square, there are diagonal creases. Push the four edges of the square and at the same time sharping those diagonal crease to valley folds.
How to make an open sink fold
Fold the paper completely flat. You completed the Open Sink fold.